text: 'use strict';
  
  exports.__esModule = true;
  
  var _dom = require('element-ui-qy/lib/utils/dom');
  
  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  var Transition = function () {
    function Transition() {
      _classCallCheck(this, Transition);
    }
  
    Transition.prototype.beforeEnter = function beforeEnter(el) {
      (0, _dom.addClass)(el, 'collapse-transition');
      if (!el.dataset) el.dataset = {};
  
      el.dataset.oldPaddingTop = el.style.paddingTop;
      el.dataset.oldPaddingBottom = el.style.paddingBottom;
  
      el.style.height = '0';
      el.style.paddingTop = 0;
      el.style.paddingBottom = 0;
    };
  
    Transition.prototype.enter = function enter(el) {
      el.dataset.oldOverflow = el.style.overflow;
      if (el.scrollHeight !== 0) {
        el.style.height = el.scrollHeight + 'px';
        el.style.paddingTop = el.dataset.oldPaddingTop;
        el.style.paddingBottom = el.dataset.oldPaddingBottom;
      } else {
        el.style.height = '';
        el.style.paddingTop = el.dataset.oldPaddingTop;
        el.style.paddingBottom = el.dataset.oldPaddingBottom;
      }
  
      el.style.overflow = 'hidden';
    };
  
    Transition.prototype.afterEnter = function afterEnter(el) {
      // for safari: remove class then reset height is necessary
      (0, _dom.removeClass)(el, 'collapse-transition');
      el.style.height = '';
      el.style.overflow = el.dataset.oldOverflow;
    };
  
    Transition.prototype.beforeLeave = function beforeLeave(el) {
      if (!el.dataset) el.dataset = {};
      el.dataset.oldPaddingTop = el.style.paddingTop;
      el.dataset.oldPaddingBottom = el.style.paddingBottom;
      el.dataset.oldOverflow = el.style.overflow;
  
      el.style.height = el.scrollHeight + 'px';
      el.style.overflow = 'hidden';
    };
  
    Transition.prototype.leave = function leave(el) {
      if (el.scrollHeight !== 0) {
        // for safari: add class after set height, or it will jump to zero height suddenly, weired
        (0, _dom.addClass)(el, 'collapse-transition');
        el.style.height = 0;
        el.style.paddingTop = 0;
        el.style.paddingBottom = 0;
      }
    };
  
    Transition.prototype.afterLeave = function afterLeave(el) {
      (0, _dom.removeClass)(el, 'collapse-transition');
      el.style.height = '';
      el.style.overflow = el.dataset.oldOverflow;
      el.style.paddingTop = el.dataset.oldPaddingTop;
      el.style.paddingBottom = el.dataset.oldPaddingBottom;
    };
  
    return Transition;
  }();
  
  exports.default = {
    name: 'ElCollapseTransition',
    functional: true,
    render: function render(h, _ref) {
      var children = _ref.children;
  
      var data = {
        on: new Transition()
      };
  
      return h('transition', data, children);
    }
  };